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https://www.readbyqxmd.com/read/29245121/co-doped-tio2-nanostructures-as-a-strong-antibacterial-agent-and-self-cleaning-cover-synthesis-characterization-and-investigation-of-photocatalytic-activity-under-uv-irradiation
#1
Maryam Hosseini-Zori
The aim of this work was synthesis and investigation of various properties of Co-doped titanium dioxide nanostructures. However, dopant has no effect on XRD pattern of the host but it can influence on the various characteristics of host such as optical and electrical properties. The results of optical properties showed that absorption energy of TiO2 decreases in presence of cobalt as dopant. Red-shift in absorption spectrum that may be due to the excitation of 3d electrons of Co ions to the conduction band of TiO2 can be considered as a strong evidence to confirm the presence of Co as dopant in TiO2 lattice...
December 8, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/29244864/resistant-and-susceptible-responses-in-alfalfa-medicago-sativa-to-bacterial-stem-blight-caused-by-pseudomonas-syringae-pv-syringae
#2
Lev G Nemchinov, Jonathan Shao, Maya N Lee, Olga A Postnikova, Deborah A Samac
Bacterial stem blight caused by Pseudomonas syringae pv. syringae is a common disease of alfalfa (Medicago sativa L). Little is known about host-pathogen interactions and host defense mechanisms. Here, individual resistant and susceptible plants were selected from cultivars Maverick and ZG9830 and used for transcript profiling at 24 and 72 hours after inoculation (hai) with the isolate PssALF3. Bioinformatic analysis revealed a number of differentially expressed genes (DEGs) in resistant and susceptible genotypes...
2017: PloS One
https://www.readbyqxmd.com/read/29244630/epidemiology-and-outcomes-of-bloodstream-infections-in-patients-with-solid-tumors-in-a-central-american-population-at-mexico-hospital-san-jose-costa-rica
#3
Jorge Calvo-Lon, Denis U Landaverde, Allan Ramos-Esquivel, Juan M Villalobos-Vindas
Purpose Bloodstream infections (BSIs) are an important cause of mortality in patients with solid tumors. We conducted a retrospective study to evaluate the epidemiologic profile and mortality of patients with solid tumors who have BSIs and were admitted to Mexico Hospital. This is the first study in Costa Rica and Central America describing the current epidemiologic situation. Methods We analyzed the infectious disease database for BSIs in patients with solid tumors admitted to Mexico Hospital from January 2012 to December 2014...
December 15, 2017: Journal of Global Oncology
https://www.readbyqxmd.com/read/29244160/interplay-between-the-catabolite-repression-control-protein-crc-hfq-and-rna-in-hfq-dependent-translational-regulation-in-pseudomonas-aeruginosa
#4
Elisabeth Sonnleitner, Alexander Wulf, Sébastien Campagne, Xue-Yuan Pei, Michael T Wolfinger, Giada Forlani, Konstantin Prindl, Laetitia Abdou, Armin Resch, Frederic H-T Allain, Ben F Luisi, Henning Urlaub, Udo Bläsi
In Pseudomonas aeruginosa the RNA chaperone Hfq and the catabolite repression control protein (Crc) act as post-transcriptional regulators during carbon catabolite repression (CCR). In this regard Crc is required for full-fledged Hfq-mediated translational repression of catabolic genes. RNAseq based transcriptome analyses revealed a significant overlap between the Crc and Hfq regulons, which in conjunction with genetic data supported a concerted action of both proteins. Biochemical and biophysical approaches further suggest that Crc and Hfq form an assembly in the presence of RNAs containing A-rich motifs, and that Crc interacts with both, Hfq and RNA...
December 13, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/29244121/in-vitro-activity-of-ceftolozane-tazobactam-versus-antimicrobial-non-susceptible-pseudomonas-aeruginosa-clinical-isolates-including-mdr-and-xdr-isolates-obtained-from-across-canada-as-part-of-the-canward-study-2008-16
#5
Andrew Walkty, Heather Adam, Melanie Baxter, Philippe Lagacé-Wiens, James A Karlowsky, Daryl J Hoban, George G Zhanel
Objectives: Ceftolozane/tazobactam is a novel β-lactam β-lactamase inhibitor combination with a broad spectrum of activity that includes Pseudomonas aeruginosa. The purpose of this study was to evaluate the in vitro activity of ceftolozane/tazobactam and relevant comparators versus a large collection of antimicrobial non-susceptible P. aeruginosa clinical isolates recovered from patients across Canada (CANWARD, 2008-16). Methods: Susceptibility testing was performed on P...
December 12, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/29243759/an-insight-into-the-photodynamic-approach-versus-copper-formulations-in-the-control-of-pseudomonas-syringae-pv-actinidiae-in-kiwi-plants
#6
Vânia Jesus, Diana Martins, Tatiana Branco, Nádia Valério, Maria G P M S Neves, Maria A F Faustino, Luís Reis, Esther Barreal, Pedro P Gallego, Adelaide Almeida
In the last decade, the worldwide production of kiwi fruit has been highly affected by Pseudomonas syringae pv. actinidiae (Psa), a phytopathogenic bacterium; this has led to severe economic losses that are seriously affecting the kiwi fruit trade. The available treatments for this disease are still scarce, with the most common involving frequently spraying the orchards with copper derivatives, in particular cuprous oxide (Cu2O). However, these copper formulations should be avoided due to their high toxicity; therefore, it is essential to search for new approaches for controlling Psa...
December 15, 2017: Photochemical & Photobiological Sciences
https://www.readbyqxmd.com/read/29243404/molecular-viability-testing-of-viable-but-non-culturable-bacteria-induced-by-antibiotic-exposure
#7
Seunguk Lee, Sungwoo Bae
Nucleic acid amplification-based methods are limited by their inability to discriminate between viable and dead cells. To overcome this drawback, propidium monoazide (PMA) combined with qPCR has been used to differentiate viable from nonviable cells in environmental samples. However, assessing bacterial physiology using PMA-qPCR remains a challenge due to its incapability of detecting metabolic activities, leading to overestimation of the viable bacteria population under an inactivation condition (e.g. antibiotic treatments)...
December 15, 2017: Microbial Biotechnology
https://www.readbyqxmd.com/read/29243368/a-2000-patient-retrospective-assessment-of-a-new-strategy-for-burn-wound-management-in-view-of-infection-prevention-and-treatment
#8
Justyna Glik, Wojciech Łabuś, Diana Kitala, Karolina Mikuś-Zagórska, Christopher D Roberts, Mariusz Nowak, Aleksandra Kasperczyk, Marek Kawecki
Infections in burn patients are still the principal cause of complications in burn injuries. The aim of this study is to assess a new strategy for burn wound management in view of infection prevention and treatment in the experience of the Burn Treatment Center in Siemianowice Śląskie. The applied methodology involved the analysis of patient records describing the hospital's epidemiological situation between 2014 and 2016. The analysis also included the use and cost of antibiotics, silver-containing dressings, and other antiseptics relative to the number of sepsis cases, including those caused by Pseudomonas aeruginosa, as well as the mortality ratio...
December 15, 2017: International Wound Journal
https://www.readbyqxmd.com/read/29243236/isolation-of-actinobacillus-rossii-from-an-aborted-piglet
#9
P K Holyoake, A Thompson
CASE REPORT: This report describes an investigation into the cause of abortions on a commercial pig farm in Victoria in October 2015 in which six sows aborted over a 2-month period. Four of the abortions occurred in the 3 weeks prior to the sows' anticipated farrowing dates and the other two occurred in the second trimester of pregnancy. An analysis of farm data showed that the abortion rate in the previous 12 months (2014-15) was more than twice that of the previous 2 years (1...
December 2017: Australian Veterinary Journal
https://www.readbyqxmd.com/read/29242901/designed-host-defense-peptides-for-the-treatment-of-bacterial-keratitis
#10
L Edward Clemens, Jesse Jaynes, Edward Lim, Satya S Kolar, Rose Y Reins, Hasna Baidouri, Samuel Hanlon, Alison M McDermott, Kathryn W Woodburn
Purpose: To limit corneal damage and potential loss of vision, bacterial keratitis must be treated aggressively. Innovation in antimicrobials is required due to the need for empirical treatment and the rapid emergence of bacterial resistance. Designed host defense peptides (dHDPs) are synthetic analogues of naturally occurring HDPs, which provide defense against invading pathogens. This study investigates the use of novel dHDPs for the treatment of bacterial keratitis. Methods: The minimum inhibitory concentrations (MICs) were determined for dHDPs on both Gram-positive and -negative bacteria...
December 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29242764/diversity-of-intestinal-bacterial-lactase-gene-in-antibiotics-induced-diarrhea-mice-treated-with-chinese-herbs-compound-qi-wei-bai-zhu-san
#11
Lu He, Yawei Liu, Yanfang Guo, Kejia Shen, Huaying Hui, Zhoujin Tan
The current investigation is trying to study the impact of the mixture of Chinese herbs Qi Wei Bai Zhu San (QWBZS) on bacterial lactase gene from antibiotics-induced diarrhea (AAD) mice, as the good curative effect of QWBZS on diarrhea. Mice (6 mice per group) were randomly selected as control, model and treatment groups. To induce diarrhea, mice in both model and treatment groups were intragastrically injected with mixture of gentamycin sulfate and cefradine (23.33 mL kg-1 day-1) twice per day and continuously for totally 5 days...
January 2018: 3 Biotech
https://www.readbyqxmd.com/read/29242374/involvement-of-adapter-protein-complex-4-in-hypersensitive-cell-death-induced-by-avirulent-bacteria
#12
Noriyuki Hatsugai, Aya Nakatsuji, Osamu Unten, Kimi Ogasawara, Maki Kondo, Mikio Nishimura, Tomoo Shimada, Fumiaki Katagiri, Ikuko Hara-Nishimura
Plant immunity to avirulent bacterial pathogens is associated with subcellular membrane dynamics including fusion between the vacuolar and plasma membranes, resulting in hypersensitive cell death. Here, we report that ADAPTOR PROTEIN COMPLEX-4 (AP-4) subunits are involved in plant immunity associated with hypersensitive cell death. We isolated a mutant with a defect in resistance to an avirulent strain of Pseudomonas syringae pv. tomato (Pto) DC3000 avrRpm1 from a vacuolar protein sorting mutant library of Arabidopsis thaliana...
December 14, 2017: Plant Physiology
https://www.readbyqxmd.com/read/29242227/complete-genome-sequence-of-the-kiwifruit-pathogen-pseudomonas-syringae-pv-actinidiae-biovar-5-originating-from-japan
#13
Russell Poulter, George Taiaroa, Nicholas Sumpter, Peter Stockwell, Margi Butler
We present the first complete genome sequence of a copper-resistant biovar 5 strain of a bacterial pathogen of kiwifruit, Pseudomonas syringae pv. actinidiae. Comparison with the genome sequence of a copper-sensitive biovar 5 isolate indicates that copper resistance is encoded on a plasmid.
December 14, 2017: Genome Announcements
https://www.readbyqxmd.com/read/29241765/oliveria-decumbens-essential-oil-chemical-compositions-and-antimicrobial-activity-against-the-growth-of-some-clinical-and-standard-strains-causing-infection
#14
Behrooz Alizadeh Behbahani, Farideh Tabatabaei Yazdi, Alireza Vasiee, Seyed Ali Mortazavi
Oliveria decumbens as a valuable medicinal plant is extensively used in traditional medicine. clinical and standard strains causing infection resistance to antimicrobial agents, is one of the important problems in medicine. The aim of this study was to investigate the antibacterial activities and phytochemical analysis of Oliveria decumbens essential oil on the growth of some clinical and standard strains causing infection (Pseudomonas aerogenes, Escherichia coli, Streptococcus pyogenes and Staphylococcus epidermidis)...
December 11, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29241456/designer-rhamnolipids-by-reduction-of-congener-diversity-production-and-characterization
#15
Till Tiso, Rabea Zauter, Hannah Tulke, Bernd Leuchtle, Wing-Jin Li, Beate Behrens, Andreas Wittgens, Frank Rosenau, Heiko Hayen, Lars Mathias Blank
BACKGROUND: Rhamnolipids are biosurfactants featuring surface-active properties that render them suitable for a broad range of industrial applications. These properties include their emulsification and foaming capacity, critical micelle concentration, and ability to lower surface tension. Further, aspects like biocompatibility and environmental friendliness are becoming increasingly important. Rhamnolipids are mainly produced by pathogenic bacteria like Pseudomonas aeruginosa. We previously designed and constructed a recombinant Pseudomonas putida KT2440, which synthesizes rhamnolipids by decoupling production from host-intrinsic regulations and cell growth...
December 14, 2017: Microbial Cell Factories
https://www.readbyqxmd.com/read/29241362/simplified-teixobactin-analogues-to-target-superbugs
#16
Ishwar Singh
Ishwar Singh speaks to Benjamin Walden, Commissioning Editor. Ishwar Singh is a Senior Lecturer in biological chemistry at the School of Pharmacy, University of Lincoln. Prior to Lincoln, he had held many prestigious fellowships such as the Alexander von Humboldt fellowship, Germany; and Senior Research Fellowship, DANIDA, Denmark and CSIR, India. He is an organic chemist. He has developed bioconjugations for DNA, RNA and polymer modifications. He is currently leading research in novel antimicrobials based on rational design against clinically important resistant bacteria (such as methicillin-resistant Staphylococcus aureus, vancomycin-resistant enterococci, mycobacteria, Klebsiella pneumoniae, Acinetobacter baumannii and Pseudomonas aeruginosa), biologics delivery, peptides, sequence-selective DNA cross linking, nanoparticles modifications for drug delivery and diagnostic applications...
December 15, 2017: Future Medicinal Chemistry
https://www.readbyqxmd.com/read/29241191/evaluation-of-behavioral-and-susceptibility-patterns-in-premenopausal-women-with-recurrent-urinary-tract-infections-a-case-control-study
#17
Saddam Al Demour, Mera A Ababneh
Recurrent urinary tract infections (UTI) are a major source of morbidity and healthcare costs. Risk factors associated with recurrence rates in premenopausal women can be attributed to patient lifestyle behavior. The aim of this study was to assess hygienic risk factors, determine pathogen distribution, and susceptibility patterns in premenopausal women with recurrent UTI. This was case-control study in which a face-to-face interview was conducted to obtain information from premenopausal women with recurrent UTI...
December 14, 2017: Urologia Internationalis
https://www.readbyqxmd.com/read/29241184/peritonitis-in-children-on-chronic-peritoneal-dialysis-the-experience-of-a-large-national-pediatric-cohort
#18
Daniela Ponce, Thyago Proença de Moraes, Roberto Pecoits-Filho, Ana Elizabeth Figueiredo, Pasqual Barretti
BACKGROUND: We performed this study to evaluate the incidence, risk factors, microbiology, treatment, and outcome of peritonitis in pediatric Peritoneal dialysis (PD) patients at a nationwide prospective study. METHODOLOGY: Patients younger than 18 years recruited in the BRAZPD II study from 2004 to 2011, who presented their first peritonitis episode, were included in the study. RESULTS: We found 125 first episodes of peritonitis in 491 children PD patients (0...
December 14, 2017: Blood Purification
https://www.readbyqxmd.com/read/29241129/improving-biocathode-community-multifunctionality-by-polarity-inversion-for-simultaneous-bioelectroreduction-processes-in-domestic-wastewater
#19
Hui Yun, Bin Liang, Deyong Kong, Aijie Wang
Bioelectrochemical systems (BESs) have been tentatively applied for wastewater treatment processes, but the complex composition of wastewater could lead to difficulties in establishing functional biofilm or result in performance instability. Few studies have investigated the enrichment of biocathode with domestic wastewater (DW) and the function. A biocathode with multi-pollutant removal capabilities was enriched based on polarity inverted bioanode, which was established with DW. The biocathode function was examined using model pollutants (nitrate, nitrobenzene and Acid Orange 7) supplemented as sole or mixed electron acceptors...
December 7, 2017: Chemosphere
https://www.readbyqxmd.com/read/29241007/sulfur-doped-laser-induced-porous-graphene-derived-from-polysulfone-class-polymers-and-membranes
#20
Swatantra Pratap Singh, Yilun Li, Jibo Zhang, James M Tour, Christopher J Arnusch
Graphene based materials have profoundly impacted research in nanotechnology and this has significantly advanced biomedical, electronics, energy, and environmental applications. Laser-induced graphene (LIG) is made photothermally and has enabled a rapid route for graphene layers on polyimide surfaces. However, polysulfone (PSU), polyethersulfone (PES), and polyphenylsulfone (PPSU) are highly used in numerous applications including medical, energy and water treatment and they are critical components of polymer membranes...
December 14, 2017: ACS Nano
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